Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
IGNITION DELAY TIME OF GELLED GREEN FUEL WITH DIFFERENT FUMED SILICA CONTENT WITH HTP
Submission Author:
Gabriel Silva Dias , SP
Co-Authors:
Gabriel Silva Dias, Marcio Teixeira de Mendonca, FERNANDO DE SOUZA COSTA, Luiz Henrique Schaffazick, Cesar Addis Valverde Salvador
Presenter: Luiz Henrique Schaffazick
doi://10.26678/ABCM.COBEM2023.COB2023-1430
Abstract
Recently, due global demands, the so called "green" propellants have gained attention. Concurrently, studies involving gelled propellants increased, since they combine some advances compared to liquid propellants. Highly concentrated hydrogen peroxide with a promoted fuel is a potential hypergolic alternative among researched propellants. Concentrations higher than 70% are required for its use as a propellant. In this sense, this ongoing experimental work aims to contribute with progress in gelled green hypergolic propellant. Using a high-speed camera, Hypergolic Ignition Delay Time (IDT) will be determined adopting High Test Peroxide (HTP) 85%vol as oxidizer and a blend of ethanolamine, hydrous ethanol, and hydrated copper nitrate as fuel. Gels are fluid substances with altered rheological properties, achieved through the addition of gelling agents. In this study, inorganic fumed silica was utilized as the gelling agent. The effect of changing gelling agent content on IDT is reported. Was found that the IDT increased exponentially with %wt of fumed silica, with no ignition guaranteed for more than 2.0%wt. A range between 1.60%wt and 1.90%wt of fumed silica was found to be appropriate for the present gel, aiming application in propulsion systems. However, IDT results obtained with drop test was significantly high comparing to green liquid fuels in literature. The next steps of this ongoing work will be the analysis of different temperatures during gelling agent addition and mixing, changing agitation levels and using different gelling agents on IDT by drop test and impinging jets test.
Keywords
Green Propellants, Ignition delay time, gelled propellants, drop test, hypergolicity
